Electric heating apparatus



H. GEISENHNER.

ELECTRIC HEATING APPARATUS.

APPLICATION FILED JUNE 21,1920.

1,406551. APatented Feb. 14, 1922.

HenT-B 'Geisenhner b MM. M

'g His ther-merg UNITED sTA Y HENRY GEISENHNER, OE sCHENEeTAnY, NEW YORK, AssIGNOR 'ro GENERAL TRIO COMPANY, A CORPORATION OE NEW YORK.

TES i ELEC- ELECTRC HEATING APPARATUS.

' Application led June 21,

To all whom 15m-ay conce/m y Be it known that I, HENRY GEisENT-TNER, a citizen ot the United States,resicling at Schenectady, in the county ot Schenectady, State of New York7 have invente-l certain new and useful Improvements in Electric Heating Apparatus, of which the -following is a specification. This inventionrelates toelectrical heating apparatiis and morev particularly to that type' wherein articles are .heatedby vthe passage of an' electric cnrrent therethrough. l

Heretofore it has'been the vpracticein heating small articles such as rivets,` bolts and the like to place the artioleinan upright position between an upper and lower electrode, the'current generally passingr from one 'end ofthe article tothe other.n An aoparatus "performing the heating'o'perat-ion according to this method is illustrated in my United States Let-tersV Patent No. 173234.7515dated December 2, 1919. I have found Vthat in many instances it is desirable to change the manner of applying the current to the articleV from that above'indicated andi have therefore devised a new improved apparatus for accomplishing this result.

An object oit my invention is 'to provide an apparatus whichshall enable rivets and the like to be heated uniformly throughout with'- Out danger ot burning or upsetting the points that areto beinserted in the holes.

A further obj ect ot' my invention is to provide a simpleV and compact apparatus capable vof rapid manipulation in which electric contact shall be made with .the side rather than the point of the article to be heated.

Y A further objeotot my invention is to provide a practical apparatus `for heat-ing rivets and the like in series without making electric contact with the ends Ot the rivets.

A further object orn my invention is to provide an vapparatus torheating articles of the class described in whichthe point ot application of the heat tothe article to be heated My invention will be better understood from the-'following,description taken in "con-A neetionV withv the accompanying drawing;` and its scope willbe pointed Outinzthe appends ed claims. 1 1 Y Referring to the drawingf, F lis a per- I Specification of Letters Patent. i

ywith the rivets.

Patented Feb. 14, 1922. 1920. seria1No.39o,5o. *A l f spectiveview of heating apparatus embodymg my invention; Fig. 2 is a detail sec-tion 'of the fixed and movable electrodes; Fig. 3

is a view similar to Fig. 2 but showing a rivet'held in a different positiongfFigs. at, 5 and 6 are detail sections of modilied forms of the electrodes. Y

i Referring to FigQl, a transformer 10 supported on a frame'11 is provided with a. primary winding 12 and a secondary winding which comprises two pivotal barsl 13. These bars are independently movable from pedals 14 'through the medium of connecting rods 15." Interposed in eac-hv connecting rod is a.

Yjoint 9pwhioh servestoinsulate the upper nal'channel 20 they sides ot'which are provided with'A notches 21 to assistin holding the articles. This electrode vis mounted upon the insulating block 22 which in turn is carried upon a shelt or cross piece 23'. Ving bolts 24 passing through slots Q'Lin't-hc ends VOt the 'shelf 23 serve to secure the shelt` adjustably 4to v the tram'e'll. Qpenings 25 in the shelf 23 permit the circulation of air around the eleotrode'and corrngations 26 formed in the sides ot the electrodes increase theirheat radiatingv surface. Fig. 1 shows the electrodes 16 raised'although'byreason of their weight they normallvoccupy a rposition in close proximity Ato the stationary electrode 19.* An angle bar 27 secured to the'v lower part of thetrame 11 serves as a stop to prevent the pedals 14 from'permitting the electrodes 16 to tall into Contact with the eleotrode19.k er y' f When it is desired toV heat rivets by the apparatus aboveV described, the electrodes are raisedby the pedals 14 to the position shown in Fig. 1 andthe rivets are placed upon' the' stationary electrode 19 acros'swthe 'channelz20- As shownl in Fig. 27 one rivet p is" placed under 'each of the movable 'electrodes. The ypedals are then released and the movablek electrodespdrop into Contact The currentr` generated in Ythe secondaryy of the .transt'ormer passes r'omfone )of the movabll'electrods 16 twoV rivets are in series in .the circuit.

through the rivet to the stationary electrode 19',Vv thence through the stationary electrode andv thel .otherfrivet to thefother movable electrode. It will bc seen thereforethat tfle S. shown in Fig. 2 of the drawing, the contact` surface of the movablegelectrode is .po

sition'ed midway of the width of the chani Y nel 20. vThe current therefore on leaving the electrode 16 divides and passes through kthe rivet in opposite directions in the man ner indicated the'arrows. By properly adjusting the position 'of the stationary electrode 19 the movable Velectrode may be made 1 @ner to bring all .scale Vwhich accumulates at Vthe, contact surfaces maybe more readily removed from a jiat'surfacef VVlVIOI'CCIVer, the. accumulation of scalewill not be so rapid on a flat surface,

`since thearticles to beheated do not 4then `alwaysfmake contact'vwith the'electrodes at thessame point. 1

.j-Articles. which4 .are considerablyV longer. than the rivet shown in Fig; 2 may be..heat ed byplacingihe same across` channel 19` at. varying angles thereto :and portionsl of 'llongfmetal'bars `may also be heatedin aa similar In'ani'ier.Y j 5' It willv bejobvious. to those skilled inthe artthat the electrode construction. which .If

haye'disclosedlgpermits of' interposing the .articles to be QheatedY between the lelectrodes so as ,to make'` end contact :therewith as in "myLetters Patent No.j1,323,751.heretofore frel'erred to. "This method. of using.V the device'.isshowninhig. 3. v The idea ofa secondarywindingcomprising .electrode carrying barsV .independentlyV incvabl'elin the. windows ofthe transformer core `is .claimed in the copending application ofEdgar-.I'.CQllinaLSerialNo. 325,656, filed September 23, 1919, assigned to the assignee of this application. j I? i 4. therivetis supported at .its inner `encg betweenthe movablevelectrode 28 and an'insulated metal block-.29 while its outer end bears against the stationary electrodeY 30.

11A `secondfrivet Valso bears against the. elec- -tro`d`e'j3() andfisj held between .the other movi fable electrode andV .an insulated'block of i jtherefore in leaving fone Voffl .the electrodes" metalfsimilar tothe block 29. The current vpfasses throughth'e rivet as indicated bythe I vvai-*1 *row-, thence the". stationary'lelec.

trodo 3() 'and .the other rivet to the other movable electrode. l n A 5F ig. 5 representsa modified construction of the Ytype of` heater' represented by. Fig. In F ig. 5, the supporting blocks 35 Vare.

Blocks 35 and electrode VVFig. 6 shows* a modified construction of the arranfement shown in Fig. V1, jin order more readily to accommodate-rivets'of var-if ous lengths. In Fig. theelectrodes 36 and 37f are mounted on the conducting base38 whichfisinsulated inlany convenient manner from the supporting shelf, suchfinsulationbeing indicated at 39. I'n'thisV arrangement, current is conducted into a rivet from 'an electrode indicated at40, and the current flows in two paths through the rivet as indicated by the arrows. i The current flowing in Vone path passes fromthe-rivetv toV electrode 36-and thence tothe othery rivet which is clamped between another movable .'electrodeand electrodes 36. and 37 in the same manner. 'that the l rivet shown. is clamped. The current flowing throughi'the V other path entersthe electrode37 andpasses to the other rivet in like manner. In this manner the two rivets are heated in series, the current passingfrom one lelectrode by two'pathsthrough oneof the articles to bev heated and ,thenceby :two paths. through another article to. be heated to another. elec- Y trode.l To adapt the device for heating articles of diferentlengths the electrode" 37 is made adjustable'along the base 38 to vary its distance from theelectrodeBG. .In thisV manner means are` provided for kvaryingQrLhe width of the channel of the channelled meinber comprising the electrodes and 37'. Any well-known means may Vbe .provided for adjusting'the electrode 3T along the base 33 and my inventionlis not limited as tothe de` tails of this Y adjusting mechanism which n Y may comprise slots and wing .bolts as shown A In the formcf my yinvention..shown in in Fig. 5, orgrooves into which on the Vmember v37 engage. The supporting shelves of Figs. .4, 5 v6 are adjustably mountedwithrespect tothe l frame of the apparatus just as Vthe shelf 23 is adjustably mounted in Fig. 1 in order to vary thepoint of cont'actof the movable projections Vthe purposeheretofore set forth.- Y t .-What I claim as new jand desire to secure by Letters Patent ofthe United States, is:

electrodes with lthe articles to b e heate'drforV Y J.. In a .derifor beating articles by pasean@ Y to be heated, and means adapted to be interposed in the heating circuit between two of the articles and constructed to support the article and forman electrical contact therewith and being adjustable to vary thefpoints of contact of the movable electrodes with the articles.

3. In an electric-heating apparatus, the combination of the primary of a transformer and a heating circuit comprising two mov-Y able arms forming portions of the secondary circuit of said transformer and Velectrodes carried by said arms and adapted toV move into contact with the articles to be heated and a conducting bed interposed in said heating circuit and adapted to support the articles ata plurality of spaced points dur` ing the heating operation. i

4. In an electric heating apparatus, the combination of thev primary of a transformer and a heating circuit comprising two movable varms forming portions of thek sec-V ondary circuit of said transformer and electrodes carried by said arms and adapted to be moved into contact with the articles to be heated and a conducting bed interposed in said heating circuit and adapted to support theV articles during the heating operation, said bed being adjustable to vary the points of contact of said electrodeswith the articles'. 5. An apparatus for Velectrically heating articlesof the class described comprising a pair of electrodes .arranged to make side contact with an article to be heated, means Y whereby one of said electrodes may be moved to and from the other to permit vinsertion and removal of the articles to be heated,

one of vsaid electrodes being constructedto provide a plurality of spaced 'surfaces for engaging the article to be heated and means whereby one of said'electrodes may be adjusted relatively to the other to vary the current path through the article to be heated.

6. In an apparatus of the class described a combined electrode and article holder comprising a channelled member and means for varying the width of the channel.

7. An apparatus Jfor electrically heating articles of theelass described comprising a stationary electrode upon which the article to be heated is adapted to be supported, said 'electrode being constructedV to support said article at a plurality of spaced points, and a cooperating relatively movable electrode arranged to engage the side of said article at a distance along the length of the article from one of said points and conduct current longitudinally of said article to heat the same.

8.L An apparatus for electrically heating articlesof the class described, comprising a pair of electrodes adapted to malte electric contact with the articles to be heated and meanspupon which the articles to be.V

heated are adapted to be supported provided with a channel-shaped contact face in cooperative relationship to each electrode arrangedtocomplete a circuit from one electrode by two pathsthrough an article to be heated and thence by two paths through another 'article to be heated to the other electrode.

9. An apparatus Vfor electrically heating articles of the class described, comprising a stationary electrode upon which the articles to be heated are adapted to be supported, a plurality-of electrodes arranged to be moved lrelatively to said stationary electrode and adapted respectively to engage said articles and conduct current thereto, characterized by the fact that said electrodes are constructed and arranged to engage the sides of the'articles to be heated and conduct current through a plurality of said articles in series. Iii-witness whereof, I have hereunto set my hand this 18th day of June, 1920.

HENRY GEisnNHoNEni. 

